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首页> 外文期刊>Environmental Science & Technology >Variable Volume Loading Method: A Convenient and Rapid Method for Measuring the Initial Emittable Concentration and Partition Coefficient of Formaldehyde and Other Aldehydes in Building Materials
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Variable Volume Loading Method: A Convenient and Rapid Method for Measuring the Initial Emittable Concentration and Partition Coefficient of Formaldehyde and Other Aldehydes in Building Materials

机译：可变体积加载方法：一种方便快速的方法来测量建筑材料中甲醛和其他醛的初始可排放浓度和分配系数

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摘要

The initial emittable formaldehyde and VOC concentration in building materials (C_0) is a key parameter for characterizing and classifying these materials. Various methods have been developed to measure this parameter, but these generally require a long test time. In this paper we develop a convenient and rapid method, the variable volume loading (WL) method, to simultaneously measure C_o and the material/air partition coefficient (K). This method has the following features: (a) it requires a relatively short experimental time (less than 24 h for the cases studied); and (b) is convenient for routine measurement. Using this method, we determined C_o and K of formaldehyde, propanal and hexanal in one kind of medium density fiberboard, and repeated experiments were performed to reduce measurement error. In addition, an extended-C-history method is proposed to determine the diffusion coefficient and the convective mass transfer coefficient. The WL method is validated by comparing model predicted results based on the determined parameters with experimental data. The determined Co of formaldehyde obtained via this method is less than 10% of the total concentration using the perforator method recommended by the Chinese National Standard, suggesting that die total concentration may not be appropriate to predict emission characteristics, nor for material classification.
机译：建筑材料（C_0）中的初始可释放甲醛和VOC浓度是表征和分类这些材料的关键参数。已经开发出各种方法来测量该参数，但是这些方法通常需要较长的测试时间。在本文中，我们开发了一种方便快捷的方法，即可变体积加载（WL）方法，可以同时测量C_o和物料/空气分配系数（K）。该方法具有以下特点：（a）它需要相对较短的实验时间（对于所研究的情况，少于24小时）； （b）便于常规测量。使用这种方法，我们测定了一种中密度纤维板中甲醛，丙醛和己醛的C_o和K，并进行了重复实验以减少测量误差。另外，提出了一种扩展C历史方法来确定扩散系数和对流传质系数。通过将基于确定的参数的模型预测结果与实验数据进行比较来验证WL方法的有效性。使用中国国家标准推荐的穿孔器方法，通过这种方法测得的甲醛的Co含量不到总浓度的10％，这表明该总浓度可能不适用于预测排放特性或材料分类。

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  • 来源
    《Environmental Science & Technology》 |2011年第23期|p.10111-10116|共6页
  • 作者

    Jianyin Xiong; Wei Yan; Yinping Zhang;

  • 作者单位

    School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China,Department of Building Science, Tsinghua University, Beijing 100084, China;

    Department of Building Science, Tsinghua University, Beijing 100084, China;

    School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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